Retrievable well packer



Aug.-l3, 1957 J. c. BuR'rNr-:R ETAL RETRIEVABLE WELL PACKER Filed Sept.26, 1955 United Steslahf 2,802,532 4 RETRIEVABLE4 WELL PACKER James C.Burtner, Houston, Tex., and Martin B. Conrad, Downey, Calif., assignorsto Baker Oil Tools, Inc., Los Angeles, Calif., a corporation ofCalifornia Application September 26, 1955, Serial No. 536,428 Claims.(Cl. 166-121) The present invention relates to subsurface well devices,andmore particularly to well packers, such as bridge plugs, capable ofbeing anchored in packed-off condition in a well casing, well liner, orsimilar conduit, disposed in a well bore. f

An object of the present invention is to provide an improved retrievableWell packercapable of functioning as a bridge plug, the well packerbeing adapted for anchoring in packed-off condition within the wellconduit against downward movement therein, being easily lowered in thewell conduit without danger of premature setting, and being easilyelevated therein for withdrawal to the top of the hole after ithas'accomplished its purpose in the well bore.

Another object of the invention is to provide an improved retrievablewell packer ofthe character indicated, which is capable of safelyholdingthigh pressures in a well conduit. t

This invention possesses many other advantages, and has other objectswhich may be made more clearly apparent from a-consideration of a form`in which it may be embodied. ThisV form isfshown'in the drawingslaccompanying and forming part of the present specification. It will nowbe described in detail, for the purpose of illustrating the generalprinciples of ther invention; but it is to be understood that suchdetailed descriptionis not to be taken in a limiting sense, since thescope of the invention is best defined by the appended claims.

Referring to the drawings:

Figure 1 is a side elevation of a well packerbeing run` in a well bore;

Fig. 2 is a longitudinal section through the well packer disposed in aliner below a strmg of casing,with thev packer parts in retractedposition;

Fig. 3 is an enlarged view, similar to packer anchored to the liner. 4

As disclosed in the drawings, it is desired to-lowera well packer A bymeans of ka running-in string B, such as a wire line, through a stringof well casing C to a desired setting point therein, or within a wellliner D that depends below the lower end of the well casing. The insidediameter of the well liner D` is than the inside diameter of thewell'casing C.

The well packer is pushed down through the iluid in the well casing andliner by-a .suitable running-in tool E that may be disposed over theupper head 10 of a control bar 11 of the well packer, whichextends intothe tubular body 12 of the well packer. The weight of the-runningin toolE will be exerted upon the `control bar to pushit in a downwarddirection. As described hereinafter,v such downward movement istransmitted .tothe main portions of the well packer A to insure `itsdownward movement through the well casing'C, or into the well liner ,D-.therebelow.

The well packer A includes the `tubular body 12, the upper end of whichis body portion 14. Surrounding the main body is a cup Fig. 2, of thesubstantially less formed as `a skeletonized valve4 Cage 13 threadedlySecured. t0 theaupper .end-,Oithemaia Patented Aug.l `13, 1957 type ofpacking 15 adapted to seal against the'wall of the well casing C or thewall of the liner D. This packing is in the form ofan upwardly facingcup, made of rubber or rubber-like material, the base 16 of the cupbeing received within a metallic thimble 17 bearing upon the upper, orlarger end, of a conical expander 18 surrounding the body, the lower, orsmall end, of this expander engaging a body shoulder 19. The valve cage13 functions as the nut, bearing upona spacer 20 within the packing cup15, which is eiective to clamp the base 16 of the packing cup againstthe thimble 17, upon the proper threading action of the upper valve cageonto the main portion 14 of the body 10.

The expander 18 has a downwardly converging tapered surface 21 adaptedto coact with corresponding tapered or inclined surfaces 22 on aplurality of circumferentially spaced slips 23 surrounding the body 14below the expander. These slips are disposed in circumferentially spacedlongitudinally extending grooves 24 in a slip ring 25. The slip ringbears against a tie ring 26, which, in turn, engages the upper end of adrag block ring 27 resting upon a` guide 28, which forms the terminalportion of the well packer. The slip ring 25, tie ring 26, drag blockring 27 and guide ring 28 `are secured together, to provide afunctionally unitary structure, by a plurality of longitudinallyyextending cap screws 29, which pass through the guide, drag block ringand tie ring for threaded reception within threaded holes 30 in the slipring 25. Tightening of the `screws 29 will secure the several partstogether.

liner gripping member 31 having wickers or teeth 32 adapted to engageand embed into the wall of the casing or liner. This gripper portion31AV also Vpossesses the ex-` y pander surface 22. Below the ,anchoringportion31 each slip member has a drag block portion 33. adapted tofrictionally slide along the wall of the well casing C, or, ifj the wellpacker is ofthe size to be set in the Vliner D below the casing, alongthe wall of the liner D. Below' the drag block portion 33, each slipmember hasa tapered surface 34 inclined in a downward and inwarddirection and terminating in a foot portion 35 extending withinanupwardly projecting rim 36 of the tie ring 26.

The drag block portion 33 will normally be in engagement with the wallof the well casing C (if the well packer is to be `set Within a wellcasing), or with `the wall of the well liner D. The upper end 33a of thedrag block portion functions as a fulcrum, permitting each slipv 23 `torock upon the casing or liner wall. The drag block portions33 of eachslip member are urged in an outward direction by a helical compressionspring 37 bearing against the base of the groove 24 and also upon the base o f aslip socket 38 below'the slip fulcrum or pivot point 33a. It isevident that when the drag block engages the casing-orliner wall,., thespring 37 will urge the drag block .portion 33 outwardly `untilsubstantially its surface or length engages the casing or liner wall.When the drag block` portion so; engages the casing or linerwall, theupper anchoring head 31 will be spaced inwardly from the wall `and willremain in such position outof contact o r engagement with the casing or`liner wall. f

ward shifting of each slip 23 under the action of itsl comteethi'32. Theupper end bf this ring 39 also engages an entire When the vtoolA is outof thej hole, theextent of `out- I of the tiev ring 26, and also byengagement of the slip with-aretaining Vring39 cir-. cumscribing `all ofthe yslips and disposed `within-an ex,-v ternal-` transverse groove 40in each slip, which may be; j provided :immediately ,below` j itscasingor vliner engaging-g 3 outwardly directed ange 41 integral withthe slip ring 25, in order that downward movement of the slip ring 25 Ywill act through the retaining ring 39 to move all the slips 23 jointlyin a bore.

As described below, the'. drag block portions'v 33 of the slip members'23 will tend to resist their longitudinal movement in the well bore,whereupon the body 12 vof the tool, together with the expander 18 andpacking structure 15, can move downwardly' relative to the slips, tocause the expanderY 18 to move into the upper slip portions 31, thetapered expander surface 21 engaging the tapered slip surfaces 22 andexpanding the slip portions 31 laterally outward into'anchoringengagement with the wall of the well casing or liner. -In expanding, theslips rock about their fulcrum points 33a to 'swing the portions 33, 35below the fulcrum pointsY inwardly and the tooth anchoring slip head 31outwardly, until the latterrmly engage the casing or liner wall.

To insure the provision of adequate frictional resistance tolongitudinal movement of the slips 23 within the well bore, the frictionafforded by the drag block portions 33, under the action of the slipsprings 37, may be supplemented by circumferentially spaced auxiliarydrag blocks 50, f leach of which is disposed in a circumferentiallyspaced groove l in the drag block ring 27. The auxiliary drag blocks 59are urged outwardly, to place their external surfaces in frictionalengagement with the casing or liner wall, by a plurality of helicalcompression springs 52 engaging the base of the drag block retainingsleeve groove Vdownward direction within the well 51 and received withinsockets 53 in each drag block to bear against the base of the socket andurge the latter outwardly of the ring 27. The extent of outward movementof the drag block is limitedY by the engagement of upper and lower dragfingers 54 with a depending rim 55 on the tie ring 26 and an upwardlyextending rim 56 on the guide 28, respectively.

To insure the appropriate entry of the apparatus into the well casing orlinen-the lower portions 57, 34 of the drag blocks 50 and the' slips 23are inclined in a downward and inward direction, so that the engagementof the drag blocks andV slips with the upper end of the casing C, orV ofthe liner- D, will force the drag blocks and the slips inwardly againstthe action of their respectable helical springs 37, 52. Y

The slips 23 and drag blocks 50 are movable longitudinally asl a unitrelative to the body 12 of the tool, the expander 18 mounted thereonandthe packing structure 15.A Thus, the slip ring 25 and drag block ring27 are slidably mounted on the lower portion of the body. When the slips23 are held in their downward position away from the expander 18, theycannot be expanded outwardly into anchoring engagement with the wall ofthe well casing or liner. It is only when the body expander 18 andpacking structure are permitted to move downwardly with respect to theslips 23, that anchoring of the latter against the casing or liner wallcan occur.

In lowering the apparatus in the well bore, the body 12 and expander 18are prevented from moving relatively downward of the slips 23 until adesired location is reached in the well casing or well liner at whichthe packer is to be anchored therewithin. The permissibility of theabovementioned relative movement to occur is dependent upon apparatusnow to be described.

The control bar 11 extends through the upper valve cage 13 andcompletely through the tubular body 14. The lower end of the control barhas a longitudinal slot 60 extending therethrough in which a cross-link61 is re' ceived, this cross-link projecting vinto diametrically opposedlongitudinally extending slots 62 in the body with the outer ends 63 ofthe cross-link, which are of substantially reduced longitudinal extent,being suitably secured to the slip `retaining ring 25, tie ring 26 anddrag block ring'27, as by clamping the ends -63 between the slipretaining ring 25 and the drag block retaining ring 27 when the screws29 are tightened. Thus, the cross-link 61 is'v coupled to movelongitudinally with the slip ring 25, drag block ring 27, slips` 23 anddrag blocks 50.

The cross-link 61 can occupy a lower position within the body 14 inengagement with the lower ends of the body slots 62, wherein the slips23 are spaced substantially below the conical expander 18. When thecross-link 61 is held in such lower position, it will engage the body14,

, assembly downwardly withit. Y In this manner, thebody 12, expander 18and packing structure 15 cannot move downwardly relative to the slips 23and drag blocks 50, and thisr action, occurs despite the fact that theYdrag block portions 33 of the slips and the auxiliary drag blocks 50 Athemselves may be frictionally engaging the wall of the cup 15 will actdownwardly on it to shift well casing C or the linerD. settingpoint isreached inthe well casing or liner at which the well packer is to` beanchored, that the downward force on the control bar 11 is relieved.`When this occurs, the Vpressure `in the well casing or liner above thepacker it and the body 12 and expander 18 downwardly, the frictionaction of the drag blocks 33, against the well casing or linerpreventing correspondingy downward movement of the slips 23.VAccordingly, `the body 12 will slide downward of the slips, as permittedby their elongated slots 62, untill the expander 18 wedges into theupper ends 31 of the slips, rocking them about their fulerums 33a andembedding their teeth 32 into anchoring engagement with the wall of thewell casing or liner.

The maximum diameter of `the control bar 11 within the body l172 of thetool is substantially less than the inside diameter of the body, todefine an annular passage 70 therebetween of substantialarea throughwhich fluid in the well bore can pass, both in an upward or downwarddirection,'depending upon the direction of .movement of the apparatus intheywell bore. To prevent downward movement of uid in Vthe'well borewhen the packer is to be anchored in packedfor'r'condition in the wellcasing, a valvehead 71 may be slidably mounted on the upper reduceddiameter portion 72 of the control bar,V

this valve head being movable downwardly into engagementwith a valveseat 73 at the upper end of the main body'` portion 14, to close theannularv passage 70 against downward ow of iiuid therethrough. Ifdesired, a helical compression spring 74l may be disposed around thecontrol bar 11, bearing against the upper end of the valve cage 413 andagainst the upper end of the valve head 71 to urge and vtend to maintainthe latter in engagement withr its companion seat 73. To prevent leakagearound the valve head when engaged with its seat, suitable seal ringsmay be provided, such as an inner seal ring 75 on the .head that canslidably and sealingly engage the periphery Yofthe control bar11, and anouter seal ring 76 on the head that canseal within the companioncylindrical seat 73 in the body 14 of the tool. Y

. Thecontrol bar 11-is guided in its longitudinal movement relativeytothe body 12 by the upper end of the valve cage 13, and by theengagement of the outer ends 77 of the 'cross-link 61, .on oppositesides of its reduced termnalportions =63, with the .inner wall of theslip ring 25. If further 'centering of the control bar 11 is deemedessential, a cross pin 78 may be provided which extendstransversely'through theV control ybar 11, this cross-link having alength substantially corresponding to the inside diameter of the lbod-y14 of the tool, in order to prevent It is only when the desiredV anysubstantial lateral motion of the control bar within the body of thetool.

Assuming that the apparatus is to be set within the well casing C, it isforced into the casing 'against the action of the springs 37, 52, thedrag blocks 50 and the slip members 23 being moved inwardly to a certainextent. The running-in tool E is disposed over the control bar vhead to'bear thereagainst in a downward direction, the running-in tool beingsecured to a running-in lstring B, such as the wire line. The running-intool E has sutilcient weight to force the entire apparatus down throughthe well casing C, the running-in tool bearing against the control bar11 to shift it downwardly, causing the upper end 60a of the control barslot 60 to engage the crosslink 61 and shift it downwardly against thebody portions defining the lower ends of the longitudinal body slots 62.The parts are then in theposition illustrated in Fig. 2. The apparatuscan now be lowered in the well casing. Fluid below the apparatus canby-pass around the packing element by liowing through the annularpassage 70 between the control bar 11 and the body 14, unseating thevalve head 71 and passing out through the` openings in the valve cage 13into the well casing above the packing. During `such lowering movement,the body 12 of the tool will not' move downwardly with respect to theslips 23, so that the slips areretained in their retracted positions,and will not be expanded outwardly into anchoring engagement with thewall of the well casing.

When the location in :the well casing is reached at which the tool is tobe anchored, the running-in string B and theArunning-in tool E needmerely be elevated to remove the downward force on the control bar 11,crosslink 61, slip assembly 25, 23 and body 12 of the tool. The frictionof the drag blocks 33, 5t) against the casing will tend to hold theslips in lthe location to which they have been lowered. The absence ofany downward movement of the tool through fluid in the casing will allowthe 'spring 74 to move the valve head 71 against its 'seat 73, closingthe annular passage 70 through the body against downward ow of fluid.Accordingly, any fluid pressure in the well casing above the packing cup15 will act downwardly on the packing cup and the body 12 of the tool,shifting the body 12 in a downward direction within the slip sleeve 25,and carrying the expander 18 downwardly with it until the expander iswedged into the heads 31 of the slips, rocking the latter outwardly ontheir fulcrums 33a to engage the slip teeth 32 with the wall of the wellcasing. Anytincrease in pressure of the fluid abovethe packing cup 15will cause the expander 18 to wedge more firmly into the slips 23,embedding their teeth to a greater extent in the wall of the wellcasing.

The aforenoted relative downward movement of the body 12 with respect tothe slip and drag block assembly is permitted by virtue of the elongateslots 62 in the body, which will allow the body to slide downwardly'along the cross-link 61.

In the event it is desired to retrieve the well packer, it is onlynecessary `to lower a suitable tool, such as an overshot, in the casing,which will pass over the control head 10 and becomecoupled to it. Theparticular retrieving tool forms no part of the present invention and,

hence, need not be described. An upward pull can now be taken on thewire line B, or other suitable running-in string, attached to theovershot, the control bar 11 being elevated in the well casing until itsshoulder 80 engages the valve head 71, lifting the latter out of itsseat 73 and opening 'the annular passage 70 to permit downward flow offluid therethrough. The control bar 11 will move upwardly until thevalve head 71 engages the valve cage 13, whereupon further upwardmovement of the control bar will carry the body 12, packing structure 15and expander 18 upwardly with it, shifting the expander out of the slips2,3, Iand allowing the `springs 37 to rock the slips about theirfulcrums 33a to shift their drag block portions 33 into fullengagementwith the casing wall, and retracting the anchoring head portions 31 awayfrom the casing' wall. The body 12 will move upwardly until the lowerends of the body slots 62 engage the cross-link y61, thereby effectivelycoupling the body to the slip assembly 25. Continued elevating movementof the running-in string B will now elevate the entire apparatus A inthe well casing toward the top of the hole. During such elevatingmovement, the fluid in the well casing can by-pass the packing cup 15 byflowing relatively down through the vannular passage 70 through thebody.

In the event it is desired to set the apparatus A in a well liner D thatextends below the well casing C, the drag block portions 33 of the slipsand the drag 'blocks 50 themselves, as well as the periphery 4of thepacking sleeve 15, may not engage the wall of the well casing duringtheir lowering therewithin. This is due to the fact that these parts areof a smaller effective diameter than the casing I. D. to operateproperly within the liner D of substantially smaller internal diameterthan the internal diameter of `the casing C. During lowering of theapparatus through the well casing C, the weight of the body 12, expander18 and packing assembly 15 may be such as to cause these parts to fallby gravity into a lower position, in which the expander 18 is disposedin wedged engagement with the anchoring slip heads 31. To prevent thisaction, the body 12, expander 18 and packing structure 15 are urged inan upward direction by a helical compression spring of adequate force,the lower end of which engages an inwardly directed flange 91 on theguide 28, the upper end of which engages the lower end 14a of the body.This spring exerts sufcient force to more than offset the weight of thebody 12, expander 18 and packing assembly 15, 17, 20 thereabove, but ispreferably not made too strong so that even relatively low pressures`encountered in the Well bore will be effective to shift the packingassembly, expander and body in a downward direction whenever theapparatus is to be anchored in the well liner. Thus, the helicalcompression spring 90 retains the parts in appropriate position forrunning through the well casing C, despite the absence of any frictionalresistance to downward movement of the apparatus therewithin (Fig. l). y

When the apparatus enters the liner D its upper en d forces the frictiondrag blocks 50 and the slips Z3 inwardly to insure adequate friction toresist longitudinal movement of the slips 23 in the well liner, and toalso insure the inward pivoting of the 'slip heads 31 from the linerwall to prevent their engagement therewith. During downward movement ofthe apparatus in the liner, the control bar 11 will engage thecross-link 61 to hold it against the lower end of the body slots 62 andinsure retention of the parts in the position disclosed in Fig. 2, untilthe setting point in the liner is reached. When such point is reached,the running-in string B and running-in' tool E are elevated from thecontrol bar head 10, whereupon the valve 71 will close, pressure in theliner D abovev the packing 15 acting downwardly thereon to shift thepacking structure, expander 18 and body 12 relatively downward of theslip and drag block assemblies, which are prevented from movingdownwardly by the frictional action of the drag blocks 33, 50 againstthe liner wall. Such downward movement can occur despite the compressionspring 90, which can be readily compressed to a greater extent, sincethe force which it exerts is much less than the friction force of thedrag members 33, 50 against the liner wall. The expander 18 moves intoand wedges against the slips 23, to rock them outwardly for the purposeof embedding their teeth 32 firmly into engagement with the wall of thewell liner.

Retrieving of the apparatus occurs in precisely the same manner asdescribed in connection with the setting and retrieving of the wellpacker in well casing.

The inventors claim:

1. In a well tool: a body adapted to be moved longitudin'ally in a wellconduit; expander means movablev longitudinally with said body in theconduislip means` moved downwardly of said slip means to cause saidexpander means to expand said slip means into engagement with theconduit; said body having an elongate slot therein; and means connectedto said slip means to move longitudinally therewith and slidable in saidslot into engagement with said body at the lower end of said slot tojointly move said body, expander means and slip means down the conduitwith said expander means out of expanding relation to said slip means.

2. In a well tool: a body adapted to be moved longitudinally in a wellconduit; expander means movable longitudinally with said body in theconduit; slip means below said expander means movable longitudinallywith respect to said body and expander means; means coacting with saidslip means and frictionally engageable with the conduit to enable saidbody and expander means to be moved downwardly of said slip means tocause said expander means Vto expand said slip means into engagementwith the conduit; said body having an elongate slot therein; a rodmovable longitudinally in said body and projecting upwardly therefrom,said rod having an elongate slot therein; and a cross member connectedto said slip means against longitudinal movement relative thereto andslidable longitudinally in said slots relative to said body and rod;said rod being movable downwardly in said body to engage said rod at theupper end of said rod` slot with said cross member and to engage saidcross member with said body at the lower end of'said body slot tojointly move said body, expander means and slip means down the conduitwith said expander means out of expanding relation to said slip means.

3. In a well tool: a body adapted Vto be moved longitudinally in a wellconduit; expander means movable longitudinally with said body in theconduit; slip means below said expander means movable longitudinallywith respect to said body and expander means; means coacting with saidslip means and frictionally engageable with the conduit to enable saidbody and expander means to be moved downwardly of said slip means tocause said expander means to expand said slip means into engagement withthe conduit; said body having an elongate slot therein; means connectedto said slip means and slidable in said slot into engagement with saidbody at the lower end of said slot to jointly move said body, expandermeans `and slip means down the conduit with said expander means out ofexpanding relation to said slip means; and spring means engaging saidbody and slip means and tending to prevent downward movement of saidbody and expander means relative to said slip means.

4. In a well tool: a body adapted to be moved longitudinally in a wellconduit; expander means movable longitudinally with said body in theconduit; slip means below said expander means movable longitudinallywith respect to said body and expander means; means coacting with saidslip means and frictionally engageable with the conduit to enable saidbody and expander means to be moved downwardly of said slip means tocause said expander ymeans to expand said slip means into engagementwith the conduit; said body having an elongate slot therein; meansconnected to said slip means and slidable in said slot into engagementwith said body at the lower end of said slot to jointly move said body,expander means and slip means down the conduit with said expander meansout of expanding relation to said slip means; and arlower guide secured.to said slip means below said body.

5. In a well tool: a body adapted to be moved longitudinally in a wellconduit; expander means movable longitudinally with said'bodyv in theconduit; slip means belowr said expander means movable longitudinallywith respect to said body and expander4 means; means coacting with saidslip means and frictionallyfengageable with the conduitrto enable saidbody-andvexpander means to be moved downwardly of said slip means tocause said expander means to expand said slip means into engagement withthe conduit; saidbody having an elongate slot therein; means connectedto said slip means and slidable in said slot into engagement with saidbody atthe lower end of said slot to jointly move said body, expandermeans and slip means down the conduit with said expander means out ofexpanding relation to said slip means; spring Ameans engaging said bodyand slip means Lil) v and tending to prevent downward movement of saidbody and expander means relative to said slip means;.and a lower guidesecured to said slip means below said body.

6. In a well tool: a body adapted to be moved longitudinally in a wellconduit; expander means movable longitudinally with said body in theconduit; slip means below said expander means movable longitudinallywith respect to said body and expander means; means coacting with saidslip means and frictionally engageable with the conduit to enable saidbody and expander means to be moved downwardly of said slip means tocause said expander means to expand said slip means to engagement withthe conduit; said body having an elongate slot therein; a rod movablelongitudinally in said body and projecting upwardly therefrom, said rodhaving an elonl gate slot therein; a cross member connected to said slipmeans against longitudinal movement relative thereto and slidablelongitudinally in said slots relative to said body and rod; said rodbeing movable downwardly in said body to engage said rod at the upperend of the rod slot with said cross member and engage said cross memberwith said body at the lower end of said body slot to jointly move saidbody, expander means and slip means down the conduit with said expandermeans out of expanding relation to said slip means; a lower guidesecured to said slip means below said body; and spring means engagingsaid guide and body and tending to, prevent downward movement of saidbody and expander means relative to said slip means.

7. In 4a well tool: a body adapted to be moved longitudinally in thewell conduit; annexpander secured to said body to move longitudinallytherewith; an annular member slidably mounted on said body below saidexpander; laterally movable slips carried by said annular member;friction drag means coacting with Isaid slips and frictionallyyengageable with the conduit to enable said body and expander to bemoved downwardly of 'said annular member and slips Ato cause saidexpander to engage and expand said slips into engagement with theconduit; said 'body having an elongate. slot therein; and meansconnected to said annular member against longitudinal movement` relativethereto and slidable in said yslot into engagement with said body at thelower end of said slot to jointly move said body, expander, annularmember and slips down .the conduit with said expander out of expandingrelation to said slips.

8. 4'In a well tool: a body adapted to be moved longitudinally in 4thewell conduit; an expander secured to saidV body and movablelongitudinally therewith; an -annular member -slidably mounted on saidbody below said expander; laterally movable slips carried lby `saidannular member; friction :drag means coacting with said slips Vandfrictionally engageable with the conduit to enable said tbody andexpander to be moved ldownwardly of said annular member and slips tolcause said expander to engage and expand said slips -into engagementwith the conduit; said body having an elongate slot therein; and means`connected to said annular member against longitudinal movement relativethereto and slidable in said slot into engagement withsaid body at thelower end of said slot to jointly move said body, expander, annularmember and slips down the yconduit with said expander out of expandingrelation to said slips; and conduit engageable drag means below saidslips Icarried by said -annular member.

9. In a well tool: a body adapted to be moved longit body and expanderto be moved downwandly of -said annular member and rslips to cause saidexpander to engage and expand said slips into engagement with theconduit; said body having an elongate slot therein; la rod movablelongitudinally in said body and projecting upwardly therefrom, said rodhaving an elongate slot therein; and a cross member connected to saidannular member against longitudinal movement relative thereto andslidabl'e longitudinally in ysaid slots relative to said body and rod;said rod being movable downwardly in said body to engage said rod at theupper end of said rod slot with 'said `cro-ss member and engage saidcross member with said body at the lower end of said -body slot tojointly move said body, expand-er, -annular member and slips down theconduit with said expander out of expanding relation to said slips.

10. In a well tool: a body adapted -to be moved longitudinally in a wellconduit; an expander lsecured -to said body to move longitudinallytherewith; an annular member slidably mounted on said body; laterallymovable slips carried by said annular member to move longitudinallytherewith; means coacting with said slips and frictionally engageablewith the conduit to enable said Ibody and expander to be moveddownwardly of said annular member and slips to cause said expander -toengage and expand said 4slips into engagement w'th the conduit; -saidbody having an elongate slot therein; a rod movable longitudinally insaid body and projecting upwardly therefrom, said rod having an elongateslot therein; a cross member connected to said annular member againstlongitudinal movement relative thereto and slidable longitudinally 4insaid slots relative to said body and rod; said rod being movabledownwardly in said body to engage said rod at the upper end of said rodslot with said cross member and engage said cross member with 4said bodyat t-he lower end of said body slot to jointly move said body, expander,Iannular member and slips down the conduit with said expander out ofexpanding relation .to said slips; and conduit engageable drag meanscarried by said annular member below lsaid slips.

References Cited in the le of this patent UNITED STATES PATENTS2,751,012 Baker et al June 19, 1956

